From Glossary of Meteorology
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An upper-air sounding that includes determination of wind speeds and wind directions.

Historically, wind data were obtained by tracking a balloon-borne radiosonde with a radio direction finder. Contemporary methods include measuring position or radiosonde velocity from a global positioning system or Loran radio navigation signals.
See also radiosonde, radiosonde observation, RAOB.

Term edited 30 December 2021.